code: def is_interpolated_string(val):
      return isinstance(val, str) and bool(get_matches(val))
  
imports: import os
  import re
  import typing
  from collections.abc import Iterable, Mapping
  from functools import singledispatch
  from funcy import memoize, rpartial
  from dvc.exceptions import DvcException
  from dvc.utils.flatten import flatten
label_desc: Use image node_id 3 for calling a global function with example usage: is_interpolated_string(val) and returns: unknown